The smaller the hernia is, the more likely it can be repaired without needing mesh. 2 cm is usually the cut off. Women of child-bearing age may be the exception to that rule. You may want to take care of the hernia before you get pregnant as they can turn into problems that you do not want to deal with during pregnancy. It is likely to get larger during pregnancy, requiring a more complex repair after you finish having children. You probably don't even need to wait to conceive after surgery. Speak with a surgeon and your obstetrician though.